Vacuum-tube socket



July 28,1925. 1,547,729 v n W. T. BOOTH VACUUM vTUBE SOCKET ...mm www.

by Aff'y.

Patented July 2s,- 192s.'

,UNITED STATES PATENT'. OFFICE.

wmrnr T. BOOTH, or BROOKLYN, Naw Yonx, assIeNOa 'ro vviastlrnaNl mn'c'rnrc conraNy, rNoonroaarnn. or NEW Yonx, N. Y., CORPORATION or Naw Yonx.

'V'AC'UUI-TUBE SOCKET.

applicativa mea september e, 191s. serial'm. 392,051.

i To all whom 'it may concern.'

Be itknown that I, WILLIAM T. BoofrH, a citizen of the United States, residing at Brookl n, in the county of Kings, State of New useful Improvements Sockets, of which the following is a full,

1 clear, concise, and exactdescription.

This invention relates to' vacuum tubes and has particular reference to al new and improved form, of socket structure to be used in vacuumtube sets in telegraphy and.

telephony.

.An object is to provide an4 improvedsocket structure whereby a lsocket in use with one form of set and adapted to lbe used with one type of tube, cannot be used'A with any other type of tube while in that particular use.

' Another object is to sov construct the abovementioned socket structure thatv the new element added, which constitutes the invention, may be readily adapted to or removed from the socket structure.. Y In the ordinary vacuum tube' socket, the

' 4tube ts by means yof a bayonet and -lockjoint into the socket, the terminalA plugs at its lower` end slightly contacting with a plurality of terminal springs. In the ordinary tube, these terminal plugs on-the Abase of the tube are definitely positioned angularly 'with respect to the bayonet pin also on the base, and -similarly the terminal sprin s on thesocket are definitely sib tiene with respect to the bayonet angularlyl lock so -t at w en t'he'tube is/ in position l definite terminal springs will contact with definite terminal plugs on the tube. In

order to adapt a socketfor use only with one type of tube, this invention comprises the provision of a plate of insulating ma.-l

tioned insulating plate and thereby pass.

therethrough to make contact with the terminal springs. This apertured plate may be `an integral part lof the socket ase plate as shown.

Ork, have invented certain new and' 1n Vacuum-Tube or may be in the form of a separate piece The invention is illustrated` in the drawing, Aof which Fig. 1 shows a plan view of the socket structure; Fig. 2 shows a partial central longitudinal section of the socket and the associatedtube-in elevation .taken on the line 1-1 of Fig. 1; Fig. 3 is an in- Verted plan view ofthe socket; and Fi 4 is a partial elevation of the upper ven of the socket.

As shown in the drawing, the socket structure comprises abase late 1 having a wall portion 2 and a cylin rical portion 3.l The socket portion 3 isl provided with a bayonet slot 4 which `is definitely located angularly with respect to a plurality of terminal springs 5, 6, 7` and 8 which are grouped centrally beneath the socket portion 3 and at one end are suitably fastened to an insulating block 9. Fastened to the late 1 and beneath the same' at a. point elow the lower opening of the socket portionis 'an insulatlng plate 10 which may,

for instance, be com osed of phenol-fibre.

This plate is fastened 1n any suitable manner, such as by rivets 11, tothe plate 1, and is provided with a sin le group of aperturesv 12, 13, 14 and 15. T ese apertures are oval in. shape and are located substantially at equal distances from .the center of the socket openin their len h lalong the circumference o a circle points being greater than their width. The are posltioned approximately as shown in lyig. 1 over'the socket terminals 5, 6, 7

and 8 so that'the centers of the terminals rawn through ythe mid- 5, 6, 7 and 8 are placed toward one end of' the apert-ures'12, 13, 14 and 15 inthe direction of movement given to the vacuum tube when locking it in the socket. The vacuum ltube comprises an evacuated envelope 16 and a base portion 17 `provided at its lower liliV end with electrode terminals of which two,

V 18 and 19 are shown. This tube is also provided with "a bayonet pin 20 which is definitely located en the side of the .tube with respect to the terminal'electrodes.

The follows l Assuming that it is desired to use a partie`- ular type of tube with this socket structure, the position of the terminal springs 5, 6, `7 and 8, the electrode terminals of the tube,

theapertures in the plate 10, and the posioperation of `the device is as tion of the bayonet slot 4: and the bayonet pein 20 are all definitely determined. it will apparent that when the proper tube constructed as above is inse in the socket and locked, its electrode terminals will register properly in the apertures of the phenol- A'fibre plate and contact with the springs of A the socket.

I springs.

What is claimed is:

1. A vacuum tube socket comprising a base plate having an aperture, a socket portion on said base plate in register with said aperture and adapted to receive a vacuum tube base, a plurality of contacts attached to said base plate below 'said socket portion, means on said socket portion ada ted to cooperate with means on theA base o a vacuum tube for locking it in said socket portion, and means interposed between said socket portion and said contacts, whereby only a vacuum tube base having a corresponding arrangement of terminal plugs with reference to said positioning means may be received within said socket portion.

23A vacuum tube socket comprising a base plate having an aperture, a socket portion on said base plate in register with said aperture and adapted to receive a vacuum tube base, a plurality of contacts attached to said base plate below said socket portion, means on said socket portion adapted to cooperate with means on the base of a. vacuum tube for locking it in said socket, and an insulating member interposed between said socket portion and said contacts, said insulating member having apertures substantially in register with the ends'of said i contacts, said apertures being'in a predetermined relation to said locking means whereby only a vacuum tube base having a similar arrangement of terminal plugs with reference to said locking means may be. received within said socket portion.

3. A vacuum tube# ket comprising av base plate having an aperture, a socket portion on said base plate in register with said aperture and adapted to receive a vacuum tube base, said socket portion having a bayonet slot ing pin on the vacuum tube base, a plurality of contacts attached to said base below said socket portion in a predetermined relation to said bayonet slot, and an insulating member interposed between said socket portion and said contacts,

member having apertures substantially in register with the ends of said contacts, said aperturesibeing) slightly larger than the terminals on the ase of a vacuum tube to be received in said socket portion whereby only a vacuum vtube base having an arrangement of terminal plugs with respect to the locking-pin similar to the arrangement of said apertures may be received within said socket portion.

In .witness whereof, I hereunto subscribe my name this 2nd day of September A. D. 1919. f

WILLIAM T. BOOTH.

said insulating adapted to receive the lock-y 

